fj12ryder wrote:
BB TX gave the link for what Carlisle, the maker of the OP's tires, says about ST tire pressure. No weight chart, just plain English: "Maintain air pressure at the maximum PSI recommended on the tire sidewall." Doesn't get any easier than that.
Easy peasy.
And along with that statement is Carlisle tire warranty:
warranty
The Warranty is void if the tire or wheel fails due to damage from improper inflation pressures, exceeding the maximum speed limit, or overloading the tire beyond the maximum load capacity stated on the sidewall.
OP.....read this from rvtiresafety.com on reasons a tire on vehicle with close spaced axle such as a RV trailer require max sidewall pressures.....assuming the tires meets OEM load requirements.
http://www.rvtiresafety.com/2013/11/interply-shear-and-other-techno-babble.html